Fix Group reset cache test
Fix Group reset cache test

Calling the factory causes cache to reset, so this wasn't really testing
resetting on saving the group.

notbakaneko/osu-web,LiquidPL/osu-web,nanaya/osu-web,notbakaneko/osu-web,nanaya/osu-web,ppy/osu-web,ppy/osu-web,notbakaneko/osu-web,LiquidPL/osu-web,notbakaneko/osu-web,nanaya/osu-web,nanaya/osu-web,LiquidPL/osu-web,nanaya/osu-web,ppy/osu-web,notbakaneko/osu-web,LiquidPL/osu-web,ppy/osu-web,ppy/osu-web,LiquidPL/osu-web